I contacted my HOA regarding some of our neighbors that have no, or have recently removed, their only two trees in the front yard.

Here is a part of their response, "... it is not required of an owner to seek permission from the HOA to have trees removed, only to have new ones installed. I trust that the owner intends to install new ones come Fall 2012 as they will need to see review and approval in working through the HOA Both the HOA and the City of Frisco have minimum tree and caliper requirements. Most owners add or replace trees in the fall and early spring of each year which are the only two recommended times in Texas."

We recently saw someone in our neighborhood cut down two 30' trees in their front yard, and the HOA doesn't have any requests, per above, that they plan on replacing them. Also, the neighbor next to him hasn't had trees in their front yard since we've moved into this area in 2007. Needless to say, two adjacent houses with zero trees in the front is quite an eye-sore.

What is, if any, the minimum tree requirement for all residential properties in Frisco where pre-existing trees were cut down? How is this enforced?

Highland Ridge is zoned Patio Home (PH) and only one tree is required. Installation of the required trees is verified at the final inspection. When two trees are required, the ordinance does not specify that both trees have to be placed in the front yard.